Pick up dri2proto from the standard proto header include path.

configure.ac

@@ -860,7 +860,7 @@ AM_CONDITIONAL(DRI2, test "x$DRI2" = xyes)
 if test "x$DRI2" = xyes; then
 	# FIXME: Bump the versions once we have releases of these.
 	AC_DEFINE(DRI2, 1, [Build DRI2 extension])
-	PKG_CHECK_MODULES([DRI2PROTO], [dri2proto >= 1.0.0])
+	PKG_CHECK_MODULES([DRI2PROTO], [dri2proto >= 1.1])
 	PKG_CHECK_MODULES([LIBDRM], [libdrm >= 2.3.1])
 fi
 

hw/xfree86/dri2/dri2ext.c

@@ -37,12 +37,12 @@
 #define NEED_REPLIES
 #include <X11/X.h>
 #include <X11/Xproto.h>
+#include <X11/extensions/dri2proto.h>
 #include "dixstruct.h"
 #include "scrnintstr.h"
 #include "pixmapstr.h"
 #include "extnsionst.h"
 #include "xf86drm.h"
-#include "dri2proto.h"
 #include "dri2.h"
 
 /* The only xf86 include */